My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Elev 112 ft, 38.992 °N 76.970 °W

      Adelphi, MD

      Cool Spring Terrace Station64°
      Updated: 11:55 PM EDT on September 30, 2026 (GMT -4)
      10 minutes ago
      80°
      58°
      64
      Feels Like 64
      Fair
      N
      1
      Higher temperature is expected today
      Wundermap
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Wed 09/30
        Low 61°f
         4% Precip. / 0 in
        Partly cloudy skies. Low 61F. Winds light and variable.
        Tomorrow
        Thu 10/01
        High 86°f
         9% Precip. / 0 in
        Partly cloudy skies. High 86F. Winds light and variable.
        Tomorrow night
        Thu 10/01
        Low 62°f
         5% Precip. / 0 in
        Mostly clear. Low 62F. Winds light and variable.
        Hourly Forecast
        Now
        64°
        12AM
        64°
        1AM
        64°
        2AM
        63°
        3AM
        64°
        4AM
        63°
        5AM
        63°
        6AM
        63°
        7AM
        63°
        7:03AM
        Sunrise
        8AM
        64°
        9AM
        67°
        10AM
        71°
        11AM
        75°
        12PM
        79°
        1PM
        82°
        2PM
        83°
        3PM
        84°
        4PM
        85°
        5PM
        84°
        6PM
        82°
        6:50PM
        Sunset
        7PM
        79°
        8PM
        76°
        9PM
        75°
        10PM
        73°
        11PM
        72°
        Precipitation
        9%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        44
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.09 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point62°F
        5. Humidity 96%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KCGS Station History
        Almanac for October 1, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 86°F 74°F 93°F 1986
        4. Low 61°F 53°F 28°F 1899
        5. Rain/Snow Depth
        6. Precipitation 0 in 0.12 in -
        7. Snow 0 in - in -
        Almanac for October 2, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 90°F 74°F 91°F
        4. Low 62°F 53°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:03 AM 6:50 PM
        3. Civil Twilight 6:37 AM 7:16 PM
        4. Nautical Twilight 6:06 AM 7:47PM
        5. Astronomical Twilight 5:35 AM 8:19 PM
        1. Length of Visible Light 12h 39m
        2. Length of Day 11h 46m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 9:56 PM 12:52 PM
        2. Waning Gibbous66% of the Moon is Illuminated
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 26
        Full Moon
        Nearby Weather Stations
        Station Location
        Temp
        Windchill
        Heat Index
        Dew Point
        Humidity
        Wind
        Precip.
        Elev.
        Updated
        Loading nearby stations…
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareers
        PWS NetworkWunderMap
        Trust CenterTerms of UsePrivacy PolicyData RightsPrivacy SettingsCookie NoticeData VendorsAccessibility Statement
        Level Access
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary